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Corticospinal Excitability During Explosive Voluntary Contractions and Its Association With Rapid Torque Production.

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Title: Corticospinal Excitability During Explosive Voluntary Contractions and Its Association With Rapid Torque Production.
Authors: Castelli, Federico (AUTHOR), Mian, Omar S. (AUTHOR), Bruton, Adam (AUTHOR), Valappil, Ashika C. (AUTHOR), Hannah, Ricci (AUTHOR), Tillin, Neale A. (AUTHOR)
Source: European Journal of Neuroscience. Nov2025, Vol. 62 Issue 10, p1-13. 13p.
Subjects: Torque, Transcranial magnetic stimulation, Muscle contraction, Evoked potentials (Electrophysiology), Motor cortex, Neural inhibition
Abstract: We investigated relationships between rapid torque and corticospinal excitability (denoted by motor‐evoked potential; MEP) and inhibition (denoted by silent period duration; SPD) during explosive voluntary contractions, as well as differences in MEP and SPD between different phases of explosive contractions and at maximum voluntary contraction (MVC) plateau. In 14 adults, and across multiple repeated trials, quadriceps muscle MEP and SPD were measured at the early, middle and late phases of knee‐extensor isometric explosive contractions, and at the MVC plateau, using transcranial magnetic stimulation (TMS). Torque at equivalent time points was also measured on trials without TMS. Using repeated measures correlation applied to early phase data from TMS trials, we found MEP and torque (measured just prior to MEP) were correlated across trials within participants (r = 0.43, p < 0.001). Using Spearman rho correlations to investigate correlations across participants for each phase, we found MEP (averaged across phases up to the phase of interest) and torque (measured on non‐TMS trials) to be significantly correlated for the middle phase only (rho = 0.73, p = 0.004). Linear mixed effects models were used to investigate the effect of phase (three explosive phases and MVC plateau) on MEP and SPD. Absolute MEP, MEP normalised to maximal M‐wave and SPD all increased across the phases of explosive contraction and up to MVC plateau (fixed effects of phase, p < 0.025). Our results suggest corticospinal excitability may be an important determinant of rapid torque. Further, corticospinal inhibition and excitability both increase throughout the rising torque‐time curve and up to MVC plateau. [ABSTRACT FROM AUTHOR]
Copyright of European Journal of Neuroscience is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Label: Title
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  Data: Corticospinal Excitability During Explosive Voluntary Contractions and Its Association With Rapid Torque Production.
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Castelli%2C+Federico%22&quot;&gt;Castelli, Federico&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Mian%2C+Omar+S%2E%22&quot;&gt;Mian, Omar S.&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Bruton%2C+Adam%22&quot;&gt;Bruton, Adam&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Valappil%2C+Ashika+C%2E%22&quot;&gt;Valappil, Ashika C.&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Hannah%2C+Ricci%22&quot;&gt;Hannah, Ricci&lt;/searchLink&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Tillin%2C+Neale+A%2E%22&quot;&gt;Tillin, Neale A.&lt;/searchLink&gt; (AUTHOR)
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22European+Journal+of+Neuroscience%22&quot;&gt;European Journal of Neuroscience&lt;/searchLink&gt;. Nov2025, Vol. 62 Issue 10, p1-13. 13p.
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  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Torque%22&quot;&gt;Torque&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Transcranial+magnetic+stimulation%22&quot;&gt;Transcranial magnetic stimulation&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Muscle+contraction%22&quot;&gt;Muscle contraction&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Evoked+potentials+%28Electrophysiology%29%22&quot;&gt;Evoked potentials (Electrophysiology)&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Motor+cortex%22&quot;&gt;Motor cortex&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Neural+inhibition%22&quot;&gt;Neural inhibition&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We investigated relationships between rapid torque and corticospinal excitability (denoted by motor‐evoked potential; MEP) and inhibition (denoted by silent period duration; SPD) during explosive voluntary contractions, as well as differences in MEP and SPD between different phases of explosive contractions and at maximum voluntary contraction (MVC) plateau. In 14 adults, and across multiple repeated trials, quadriceps muscle MEP and SPD were measured at the early, middle and late phases of knee‐extensor isometric explosive contractions, and at the MVC plateau, using transcranial magnetic stimulation (TMS). Torque at equivalent time points was also measured on trials without TMS. Using repeated measures correlation applied to early phase data from TMS trials, we found MEP and torque (measured just prior to MEP) were correlated across trials within participants (r = 0.43, p &lt; 0.001). Using Spearman rho correlations to investigate correlations across participants for each phase, we found MEP (averaged across phases up to the phase of interest) and torque (measured on non‐TMS trials) to be significantly correlated for the middle phase only (rho = 0.73, p = 0.004). Linear mixed effects models were used to investigate the effect of phase (three explosive phases and MVC plateau) on MEP and SPD. Absolute MEP, MEP normalised to maximal M‐wave and SPD all increased across the phases of explosive contraction and up to MVC plateau (fixed effects of phase, p &lt; 0.025). Our results suggest corticospinal excitability may be an important determinant of rapid torque. Further, corticospinal inhibition and excitability both increase throughout the rising torque‐time curve and up to MVC plateau. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: &lt;i&gt;Copyright of European Journal of Neuroscience is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=189709210
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      – Type: doi
        Value: 10.1111/ejn.70321
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 1
    Subjects:
      – SubjectFull: Torque
        Type: general
      – SubjectFull: Transcranial magnetic stimulation
        Type: general
      – SubjectFull: Muscle contraction
        Type: general
      – SubjectFull: Evoked potentials (Electrophysiology)
        Type: general
      – SubjectFull: Motor cortex
        Type: general
      – SubjectFull: Neural inhibition
        Type: general
    Titles:
      – TitleFull: Corticospinal Excitability During Explosive Voluntary Contractions and Its Association With Rapid Torque Production.
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            NameFull: Castelli, Federico
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              Text: Nov2025
              Type: published
              Y: 2025
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